University of California, Berkeley, student Nicolas Leslie, 20, has been missing since Thursday's terror attack in Nice

A University of California, Berkeley, student who was studying abroad in France is missing after Thursday's terror attack in Nice.

Nicolas Leslie, 20, of Del Mar, California, is one of 85 Berkeley students on a 15-day study abroad trip on entrepreneurship in Europe. He has been unaccounted for since the attacks.

Three other students in the program were injured in the attacks when a man identified as Mohamed Lahouaiej Bouhlel plowed into a crowd of some 30,000 local people and tourists attending a fireworks display to celebrate Bastille Day along the Mediterranean seashore.

One student broke his foot while the other two students broke legs. The injured students have not been identified.

A Texan and his 11-year-old son on a family vacation were among at least 84 people killed, officials said on Friday.

State Department spokesman John Kirby did not name the two victims, but friends on social media identified them as father and son Sean and Brodie Copeland of Lakeway, Texas.

Leslie, a junior in UC Berkeley's College of Natural Resources, was with friends who all dove out of the way of the oncoming truck, Leslie's father, Conrad Leslie, told The Wall Street Journal.

All of his friends have been accounted for, but Leslie did not return to his student housing on Thursday.

Leslie, pictured above with his uncle and an unidentified woman on the beach in Nice in 2015, is one of 85 Berkeley students on a 15-day study abroad trip on entrepreneurship in Europe

Leslie, pictured with his mother, is a junior in UC Berkeley's College of Natural Resources. He was with friends watching a fireworks display to celebrate Bastille day when the attack occurred

Conrad Leslie believes that his his son dodged the truck and could be among the injured still in hospitals across Nice.

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Conrad Leslie last spoke to his son on Wednesday, when he appeared to be enjoying his time abroad.

'He was happy and everything was fine,' he told The Wall Street Journal. 'He was there watching fireworks with everyone else.'

UC Berkeley is working with local officials, US consular officials and Leslie's family to try to find Leslie, according to CBS San Francisco.

Leslie's uncle, Fabio Bottini, who is in contact with the student's mother in California, has been checking Nice hospitals in hopes of finding his nephew, The Wall Street Journal reported.

Leslie's father, Conrad Leslie believes that his his son dodged the truck but could be among the injured still in hospitals across Nice

Leslie's (pictured above with friends) uncle is in contact with his nephew's family in California and has been searching hospitals in Nice trying to find him

The Berkeley students were studying at a program affiliated with the international European Innovation Academy in Nice, the university said.

The program was suspended temporarily as France marks three days of mourning, and students will be given the option of returning home early, the university said.

Study abroad administrators, students, consular officials and family members are searching for Leslie, the university said.

'Our hearts go out to all of those impacted by the senseless violence that occurred yesterday in Nice, France,' Vice Chancellor Cathy Koshland and Associate Vice Chancellor and Dean of Students Joseph Defraine Greenwell said in a message to students.

At least 84 people were killed, 10 of them children, and 202 more were wounded.

The State Department confirmed Friday morning that at least two Americans are among the dead in the Nice, France Bastille Day attack. Friends and family identified them as father and son Sean and Brodie Copeland.

Sean, a 51-year-old Lexmark Corporation executive, and his 11-year-old son were watching the Bastille Day fireworks on the Nice waterfront on Thursday when a terrorist drove a truck through the crowds and opened fire - killing at least 84.

Father and son Sean, 51 (right), and Brodie Copeland have been named as the two Americans killed in the Nice, France terror attacks. Eleven-year-old Brodie is pictured on the left playing in the sea in a photo sent to a friend the day of the attack

The father and son were on a family vacation with Mr Copeland's wife Kim, 39 (right), and his two adult children from a prior relationship, 29-year-old Maegan (second left) and 21-year-old Austin (second right)

Sean was believed to be taking part in a 'dream holiday' to the Riviera when he was killed by terrorists believed to be affiliated with ISIS. His son Brodie is pictured on the left in his baseball portrait. Father and son pictured on the right after a trophy ceremony

A family friend said that Mr Copeland's wife Kim, 39, and his two adult children from another marriage, 21-year-old Austin and 29-year-old Maegan, 'witnessed the horrible tragedy but were able to get out of harm's way'.

The family of five started their journey in Pamplona, Spain then continued on to Barcelona before crossing the border into France to celebrate Bastille Day in Nice.

Eldest child Maegan, a technical recruiter for Uber, posted a picture on Instagram of her and her brother Austin, a Texas State University senior, dressed in white for the Running of the Bulls in Pamplona last week.

Mr Copeland, an alumni of the University of North Texas in Denton, was the vice president of North and South America for Lexmark Corporation's Kapow Software Division. He also served as an administrator on his youngest son's baseball team.

French officials said Friday that Bouhlel, a 31-year-old Tunisian resident of Nice, was known to police for petty crime and violence including road rage, but had not been suspected of Islamist militancy.

Earlier this month, UC Berkeley sophomore Tarishi Jain was one of 20 hostages killed in Dhaka, Bangladesh, by Islamic militants.

Crime scene investigators work on the 'Promenade des Anglais' after a truck crashed into the crowd during the Bastille Day celebrations on Thursday in Nice

woman places candles in front of a memorial on the 'Promenade des Anglais' where at least 84 people died and many were wounded after a truck drove into the crowd